The UNC hiball
is an optical tracking device used for medical and virtual environment
tracking. We believe it has the largest tracking volume, highest speed and
highest resolution of any VR tracking system. We have two tracker areas in
operation, one of about 500 sqft. and the other about 100 sqft.
Either of these areas can support multiple, simultaneous hiballs.
Normally one is mounted to an HMD and another to the object of interest
(ultra sound wand, pointer, glove, shotgun, etc…).
Virtual and Augmented Reality Tracking:
In this example, we have mounted one hiball on an HMD and the other on a toy shotgun. This setup was used for a project by Arun Neelamkavil for a skeet shooting simulation for our Exploring Virtual Worlds project class. Some of the pictures of the setup being used are shown here. Another variation of this setup was a series of tests performed by Ben Lok. In his experiments he was using the setup to determine the accuracy of aiming a rifle with the hiball as the tracker.
The results of Ben's experiments showed an accuracy of the rifle mounted hiball to be about twice as accurate as needed for
tracking of an M16 / AR15 rifle (+/- 4.6 inches at 100 meters).
The Hiball tracker system was designed by a team
of engineers in the Microelectronic Systems Laboratory at the Computer
Science Department at the
The HiBall tracker has been licensed and commercialized
from UNC by 3rdTech Inc. where full
systems are for available for sale.
Hiball optical tracker system mounted to an HMD & toy Shotgun. Note tracker ceiling tiles.
Hiball optical tracker system, HMD & toy (1/2 scale) Shotgun.
HMD & toy Shotgun.
Closeup of mount
HMD & shotgun with Hiballs mounted
Tracker hiball mounted to weapon system
Kurtis Keller 4/20/2006